实现在LISTCTRL显示文件夹及目录，并可以在COMBOBOXEX选择显示各个盘-it is implemented that it can show the file document and its path by the listctrl, and in the combbox, it can be selected the root of the disk

通过comboBoxEx控件实现类似资源管理器的程序，可以在下拉列表中选择一个文件夹或硬盘，通过MessageBox显示选择的路径。-ComboBoxEx control through the implementation of similar procedures Explorer, you can drop-down list, select a folder or hard drive, through the MessageBox shows the path of choice.